Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cce31063615dd439c6af63095f3b71c3c8ac50dca9bf8cc8eac0c40d3a3c3e57' 
  AND token = 'Xb0KF+jgwRXLfO8itGpVg1aFuvurpZ6H0kL1P30wgM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}